查看文章

The crystallography, microstructure and mechanical property of as-quenched martensite of Fe–0.2 C–Mn (–V) alloys of which the prior austenite grain sizes are 370–2 mm were studied. The prior austenite grain, whose size is larger than 28 mm, is divided by several packets. Those packets are subdivided by blocks containing sub-blocks, each of which corresponds to the Kurdjumov-Sachs variant. When the prior austenite grain size is about 2 mm, one packet tends to grow predominantly. Each packet is divided by blocks containing sub-blocks.